Heterogeneous surfaces of structured hairy-rod polymer films: Preparation and methods of functionalization

We report a versatile technique for the formation of a biofunctionalized micrometer scale pattern on solids which is based on Langmuir-Blodgett multilayers of hairy-rod polymers stbilized by partial photochemical cross-linkig. Three Three types polymer patterns consisting of hydrophobic and hydrophilic domains are generated. These structured films are locally functionalized in two way: (1)by activating the hairy-rod cushions with active esters and (2) by the deposition of a lipid monolayer onto the hydrophobic domains. For the latter procedure use is made of the fact that lipid monolayer are only assmbled over domains with matfhed polarity. The fluidity and continuity of the monolayer omaians was analyzed by latral diffusion measurements on the basis of photoblaching techniquse. The polarity of the domains is monitored by the interference contrast microcopic observation of water microdrops deposited on the structured hairy-rod films.